JPH02312038A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To make room to a space, to miniaturize and simplify a device, to make an optical path short, to strengthen it against outside light and to improve the reliability of the device by integrating a light emitting element in a post which guides a tape. CONSTITUTION:A magnetic tape 1a contained in a cassette case 5 is drawn out by an arm 9a and the post 8a and loaded to a recording and reproducing device 1b at recording and reproducing positions 8b and 9b. The tape is moved in a direction shown by the arrow A when the recording or the reproducing thereof is started and light is emitted to a light receiving element 6 from the light emitting element 7 in the post 8a in a direction shown by the arrow C. Since it is detected by a microcomputer in the device that the received light quantity of the element 6 is increased when the terminating end 3 of the tape having high transparency comes out before the tape is used up by being taken up with the aid of a reel hub 4, a processing operation at the terminating end is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic recording and reproducing apparatus that uses a leader tape with high light transmittance to determine the beginning and end of a running tape.

2. Description of the Related Art In recent years, magnetic recording and reproducing devices such as cassette video tape recorders are desired to be smaller and lighter.

An example of the above-mentioned conventional magnetic recording/reproducing device will be described below with reference to the drawings.

FIG. 3 shows the configuration of the tape used, and FIG. 4 shows the configuration and operation of a conventional magnetic recording/reproducing device, showing a top view and a side view of the device. FIG. 5 shows the operation of the device when detecting the start and end ends.

In FIG. 3, 1 is a magnetic tape for performing magnetic recording and reproduction, 2 is a starting leader tape provided at the starting end of the magnetic tape 1, and 3 is a terminal leader tape provided at the ending end of the magnetic tape 1. Note that the starting end leader tape 2 and the ending end leader tape 3 are tapes with high light transmittance, unlike the magnetic tape 1. .

In FIG. 4, 1 is a magnetic tape, 1b is in a recordable and reproducible state, and 1a is housed in a cassette case 5. A reel hub 4 winds and holds the magnetic tape 1, and is housed in the cassette case 5. 7 is a light emitting element provided at the beginning and end of the magnetic tape 1 to detect the start and end tape 2°3;
6 is a light receiving element provided to receive light emitted from the light emitting element 7; 8 is a post that guides the magnetic tape 1; 9 is rotatably supported by a substrate (not shown); This is an arm that holds the magnetic tape 1 and moves the magnetic tape 1 from the position where it is housed in the cassette case 5 to a position where it can be recorded and reproduced. 10 is the cassette case 5
A roller post 11 is rotatably supported on a substrate (not shown) and guides the magnetic tape 1; 11 is an impedance roller rotatably supported on a substrate (not shown);
This guides the vehicle and allows it to run stably.

The operation of the conventional magnetic recording/reproducing apparatus configured as described above will be described below.

The magnetic tape 1a stored in the cassette case 5 is pulled out from the cassette case 5 by the arm 8a and post 9a rotating in the direction of arrow B, and the arm 8
and the post 9 stops at recording/reproducing positions 8b, 9b,
The magnetic tape 1 is mounted at the recording/reproducing position 1b. This makes the device capable of recording and reproducing. The loaded magnetic tape 1 moves in the direction of arrow A when the device starts recording and reproducing (at this time, the device moves the magnetic tape 1
In order to detect the end of the light emitting element 7, light is emitted from the light emitting element 7 to the light receiving element 6 in the direction of arrow C. Eventually, the magnetic tape 1 wound around the reel hub 4 becomes undone, and the terminating tape 3 shown in FIG. Since the rate is high, when the terminating tape 3 begins to pass between the light emitting element 7 and the light receiving element 6, the light receiving element 6 receives a larger amount of light than when the magnetic tape 1 is passing. Become.

A microcomputer built into this device detects this state and performs operation processing at the end.

Next, signal processing and mechanism operation at the beginning and end will be explained with reference to FIG.

At the start of recording and reproduction, the microcomputer 30 issues a light emission command to the light emitting element 7. The light emitting element 7 emits light, but due to the magnetic tape 1 having low transmittance, the light cannot be sufficiently transmitted to the light receiving element 6, and the light receiving element 6 does not send a signal confirming light reception to the microcomputer 30. Later, when the termination tape 3 shown in FIG. Begins to emit light reception confirmation signal. Upon receiving the light reception confirmation signal, the microcomputer 30 issues a stop command to the tape drive device 31.
, tape 1 stops, and recording/playback ends.

Problems to be Solved by the Invention However, with the above configuration, in the case of an apparatus using a cassette for which the optical path of the light emitting element 7 is not defined by the standard or a cassette that is not provided in a cassette case, it is difficult to miniaturize the apparatus. At the same time, it has become difficult to secure the optical path and also to secure a space for installing the light emitting element 7. Furthermore, since the optical path is long, there is a problem in that malfunctions may occur due to external light.

The present invention solves the above problems, and since the light emitting element and the light receiving element are placed adjacent to each other, the light emitting element is placed in a post that guides the tape, thereby creating a long optical path and making it easier to install the light emitting element. The purpose of this invention is to provide a more compact magnetic recording/reproducing device that does not require space reservation.

Means for Solving the Problems In order to solve the above-mentioned problems, the magnetic recording and reproducing apparatus of the present invention includes a light-emitting element that emits light and is provided in a post that guides the tape in order to determine whether there is a beginning or end tape. The light receiving element is provided with a light receiving element sandwiched between tapes to receive the light emitted from the light emitting element.

Effects of the present invention Due to the above-described configuration, it is possible to arrange other mechanisms in the space of the conventional light emitting element, and furthermore, it is not necessary to secure an optical path for emitting and receiving light, making it possible to miniaturize the device. Become. Furthermore, since it does not require a long optical path, it is resistant to external light (and reliability is also improved).

Example Below, regarding a magnetic recording and reproducing device according to an example of the present invention,
This will be explained with reference to the drawings.

FIG. 1 shows the structure and operation of a magnetic recording/reproducing apparatus according to an embodiment of the present invention, and shows a schematic top view and a side view of the apparatus. FIG. 2 shows the signal processing and operation at the end of the device.

Here, 1 is a magnetic tape for magnetic recording and reproduction, and 1b
is in a recording and playable state, and 1a is in cassette case 5.
It shows the state where it is stored.

4 is a reel hub that winds and holds the magnetic tape 1;
It is housed in the cassette case 5.

Numeral 7 is a light emitting element provided at the beginning and end of the magnetic tape 1 to detect the beginning and end tapes 2 and 3, and 6 is a light receiving element that receives the light emitted from the light emitting element 7. , 8 is a post that guides the magnetic tape 1 and houses the light emitting element 7 inside. 9 is a substrate (
This arm is rotatably supported by a magnetic tape (not shown), holds the post 8, and moves the magnetic tape 1 from a position housed in the cassette case 5 to a position where recording and reproduction are possible. 10 is a roller post that is rotatably supported by the cuff set case 5 and guides the magnetic tape 1; 11 is an impedance roller that is rotatably supported by a substrate (not shown) and guides the magnetic tape 1. This is to ensure stable running.

The operation of the magnetic recording/reproducing apparatus configured as described above will be explained.

The magnetic tape 1a stored in the cassette case 5 is pulled out from the cassette case 5 by the arm 8a and post 9a rotating in the direction of arrow B, and the arm 8
The post 9 stops at the recording and reproducing positions ff8b and 9b, and the magnetic tape 1 is loaded into the recording and reproducing device tlb. This makes the device capable of recording and reproducing. The mounted magnetic tape 1 moves in the direction of arrow A when the apparatus starts recording and reproducing. At this time, the apparatus starts emitting light in the direction of arrow C from the light emitting element 7 housed in the post 9 to the light receiving element 6 in order to detect the end of the magnetic tape 1. Eventually, the magnetic tape 1 wound around the reel hub 4 runs out, and the terminating tape 3 shown in FIG. 3 comes out. Furthermore, as described above, the terminating tape 3 has a high light transmittance, so when the terminating tape 3 begins to pass between the light emitting element 7 and the light receiving element 6, the light receiving element 6 detects that the magnetic tape 1 passes through the terminating tape 3. You'll receive more light than when you're in the room. A microcomputer built into this device detects this state and performs operation processing at the end.

The signal processing and operation at the beginning and end in FIG. 2 are similar to the conventional signal processing and operation in FIG. 5.

Effects of the Invention As described above, according to the present invention, by incorporating the light emitting element into the post that guides the tape, it becomes possible to arrange other mechanisms in the space of the conventional light emitting element, and furthermore, it is possible to There is no need to secure an optical path for receiving light, and the device can be made smaller and simpler. Furthermore, since a long optical path is not required, the device is strong against external light, and the reliability of the device can also be improved.

[Brief explanation of the drawing]

FIG. 1 is a plan view and side sectional view showing the configuration of an embodiment of the present invention, FIG. 2 is a block diagram showing the flow of signals at the beginning and end,
FIG. 3 is a plan view showing the configuration of a tape, FIG. 4 is a plan view and side sectional view showing the configuration of a conventional magnetic recording/reproducing device, and FIG.
The figure is a block diagram showing a conventional signal flow at the beginning and end. ■...Magnetic tape, 2...Starting end tape, 3...Ending tape, 4...Reel hub, 5...Cassette case, 6 ...... Light receiving element, 7... Light emitting element, 8... Post, 9... Arm. Name of agent: Patent attorney Shigetaka Awano and one other person Figure 2 Figure 3
2-・Additional fabric tape 3----jNLjIIvl++
-7' S・-Cassette L'7-S (b) Fig. 5

Claims (1)

[Claims] A magnetic recording and reproducing apparatus using a magnetic head for recording and reproducing information on a magnetic tape, and beginning and end tapes provided at both ends of the magnetic tape and having different light transmittances from the magnetic tape, the magnetic recording and reproducing apparatus comprising:
a member for drawing the magnetic tape out of the cassette from a cassette containing a reel wound with the magnetic tape; a light-emitting/light-receiving element provided in the member for determining the presence or absence of the beginning and end tape; and the light-emitting element. / A magnetic recording/reproducing device characterized by having a light receiving/emitting element provided at a position sandwiching a light receiving element and a tape.